Holl's
Holl's Onyxia Cube — 4-Person ThermoWood Outdoor Sauna (Made in Europe)
Holl's Onyxia Cube — 4-Person ThermoWood Outdoor Sauna (Made in Europe)
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The Onyxia Cube is the architectural one: a rounded-square cabin of 42mm ThermoWood® Finnish pine, black outside, honey-toned inside, built in Europe and glazed however you want it — a full glass façade to face the view, or a solid wall for total seclusion. Four can sit; two can lie flat on the lounger configuration and watch the sky.
ThermoWood®: durability by heat, not chemicals
ThermoWood is Finnish pine thermally modified at high temperature — nothing added, everything stabilised. The result resists weather, insects and warping for years of British seasons, and ages to a naturally deep tone. Inside, spacious abachi benches stay comfortable at full temperature, with LED lighting for evening sessions.
Choose your heater
The Onyxia Cube is supplied without a heater so you can spec it your way — we recommend an electric stove from 4.5kW (see our sauna heaters range; we'll help you match size to cabin volume before you order).
Specification
| Capacity | 4 seated, or 2 reclining loungers |
| Dimensions (W × D × H) | 210 × 160 × 220 cm (floor space ~153 × 142 cm) |
| Wood | ThermoWood® Finnish pine, 42mm — Made in Europe |
| Benches | Abachi, two levels, L-shaped |
| Glazing | Front or rear glass façade, or solid — configurable |
| Heater | Electric, from 4.5kW — not included |
| Warranty | 4 years wood · 2 years electrical components |
Power and installation
Plan a firm level base and a dedicated outdoor-rated circuit for your chosen heater. Two-person assembly; ask us about heater pairing and we'll spec the right kW for the cabin.
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